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- Title
Cryptanalysis of a white‐box SM4 implementation based on collision attack.
- Authors
Wang, Rusi; Guo, Hua; Lu, Jiqiang; Liu, Jianwei
- Abstract
White‐box cryptography is to primarily protect the key of a cipher from being extracted in a white‐box scenario, where an adversary has full access to the execution environment of software implementation. Since the introduction of white‐box cryptography, a number of white‐box implementations of the Chinese SM4 block cipher standard have been proposed, and all of them have been attacked based on Billet et al.'s attack. In this study, we show that collision‐based attack can work more efficiently on Shi et al.'s white‐box SM4 implementation than the previously published attacks, by devising an attack with a time complexity of 223, significantly reducing the previously known time complexity of 249 to a very practical level. Our attack can also be similarly applied to some other white‐box SM4 implementations.
- Subjects
CRYPTOGRAPHY; DIGITAL rights management; BLOCK ciphers; STRATEGIC planning; COMPUTER software
- Publication
IET Information Security (Wiley-Blackwell), 2022, Vol 16, Issue 1, p18
- ISSN
1751-8709
- Publication type
Article
- DOI
10.1049/ise2.12045